97934-09-3Relevant articles and documents
NEW SYNTHESIS OF PYRIDOPYRIMIDINES.I. REACTION OF 6-ALKOXY-5-CYANO-3,4-DIHYDRO-2-PYRIDONES WITH GUANIDINE AND CYANAMIDE
Victory, Pedro,Nomen, Rosa,Colomina, Octavio,Garriga, Miquel,Crespo, Ana
, p. 1135 - 1141 (2007/10/02)
The first step of a new synthesis of pyridopyrimidines, the substitution of the enolic alkoxyl group of 6-alkoxy-5-cyano-3,4-dihydro-2-pyridones (2) by guanidine and cyanamide is described.By this procedure a series of 2,4-diamino-5,6-dihydropyrido